TypeError {} (anonymous function)

[benzmuircroft]

My console log shows me this TypeError with no line number for the error

[WebSocket] response header:
HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Accept: EKe7xY9gtGUsL6JCb3hs1x2qLU8=

TypeError {}
(anonymous function)

my code is:

var pf=require('policyfile').createServer(['http://website.com','website.com','website.com:*','website.com:8004','website.com:8005']);
pf.listen(function(){console.log(':3 yay')});

Where might this error come from?

[3rd-Eden]

Do you have a reproducible test case?

[benzmuircroft]

I can show you my full files, if you like? would you like me to email the client.js and server.js

[benzmuircroft]

You've got email